A low-angle, full body shot captures a petite mermaid girl with the appearance of a primary school student, floating gracefully underwater in a twilight sea. She has an innocent, youthful face with large, drooping red crystal eyes with strong highlights, thick black eyelashes, and red eyeliner, gazing softly with a gentle smile. Her incredibly long, shimmering silver hair flows wildly in the strong underwater currents, with long side-locks reaching her chest. She possesses a healthy matte skin texture and wears small royal blue sapphire earrings. Her attire consists of a cross-halterneck, waist armor, a front loincloth, and gauntlets—all crafted from intricate, translucent stained glass—exposing her midriff,navel, and collarbone. Golden chains,ornaments, and bracelets adorn her body, shimmering against her fish tail. The scene is filled with dynamic movement, featuring strong backlighting, intense rim light, and the Tyndall effect as light pierces the water. Lens flares and multiple reflections dance across the stained glass and golden jewelry, creating a mystical, ethereal atmosphere with deep depth of field and luminous environment light.